Chemical Sciences Seminars
Lanthanide Sensitization in Semiconductor Nanoparticles
by Dr. Prasun Mukherjee (University of Pittsburgh, USA)
Friday, July 8, 2011
from
to
(Asia/Kolkata)
at Colaba Campus ( AG-80 )
at Colaba Campus ( AG-80 )
TIFR, Colaba, Mumbai 400005
| Description |
The sensitization of luminescent lanthanide terbium (Tb3+) and europium (Eu3+) cations by the electronic structure of zinc sulfide (ZnS) semiconductor nanoparticles has been explored. Two different strategies are considered, namely, a doping and an external salt addition approach. Excitation spectra collected while monitoring the lanthanide emission bands reveal that the ZnS nanoparticles act as an antenna for the sensitization of Tb3+ and Eu3+. The mechanism of lanthanide ion luminescence sensitization is rationalized in terms of an energy and charge transfer between trap sites. |